325 lines
11 KiB
C
325 lines
11 KiB
C
/*
|
|
* lua.h - Lua configuration management header
|
|
*
|
|
* Copyright © 2008 Julien Danjou <julien@danjou.info>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
|
|
#ifndef AWESOME_LUA_H
|
|
#define AWESOME_LUA_H
|
|
|
|
#include <ev.h>
|
|
#include <lua.h>
|
|
#include <lauxlib.h>
|
|
|
|
#include "common/util.h"
|
|
#include "common/draw.h"
|
|
|
|
/** Object types */
|
|
typedef enum
|
|
{
|
|
AWESOME_TYPE_STATUSBAR = 1,
|
|
AWESOME_TYPE_TITLEBAR
|
|
} awesome_type_t;
|
|
|
|
/** Type for Lua function */
|
|
typedef int luaA_function;
|
|
|
|
#define DO_LUA_NEW(decl, type, prefix, lua_type, type_ref) \
|
|
decl int \
|
|
luaA_##prefix##_userdata_new(lua_State *L, type *p) \
|
|
{ \
|
|
type **pp = lua_newuserdata(L, sizeof(type *)); \
|
|
*pp = p; \
|
|
type_ref(pp); \
|
|
return luaA_settype(L, lua_type); \
|
|
}
|
|
|
|
#define DO_LUA_GC(type, prefix, lua_type, type_unref) \
|
|
static int \
|
|
luaA_##prefix##_gc(lua_State *L) \
|
|
{ \
|
|
type **p = luaA_checkudata(L, 1, lua_type); \
|
|
type_unref(p); \
|
|
*p = NULL; \
|
|
return 0; \
|
|
}
|
|
|
|
#define DO_LUA_EQ(type, prefix, lua_type) \
|
|
static int \
|
|
luaA_##prefix##_eq(lua_State *L) \
|
|
{ \
|
|
type **p1 = luaA_checkudata(L, 1, lua_type); \
|
|
type **p2 = luaA_checkudata(L, 2, lua_type); \
|
|
lua_pushboolean(L, (*p1 == *p2)); \
|
|
return 1; \
|
|
}
|
|
|
|
#define luaA_dostring(L, cmd) \
|
|
do { \
|
|
if(a_strlen(cmd)) \
|
|
if(luaL_dostring(L, cmd)) \
|
|
warn("error executing Lua code: %s", \
|
|
lua_tostring(L, -1)); \
|
|
} while(0)
|
|
|
|
#define luaA_checktable(L, n) \
|
|
do { \
|
|
if(!lua_istable(L, n)) \
|
|
luaL_typerror(L, n, "table"); \
|
|
} while(0)
|
|
|
|
#define luaA_checkfunction(L, n) \
|
|
do { \
|
|
if(!lua_isfunction(L, n)) \
|
|
luaL_typerror(L, n, "function"); \
|
|
} while(0)
|
|
|
|
#define luaA_checkscreen(screen) \
|
|
do { \
|
|
if(screen < 0 || screen >= globalconf.screens_info->nscreen) \
|
|
luaL_error(L, "invalid screen number: %d", screen); \
|
|
} while(0)
|
|
|
|
/** Check that an object is not a NULL reference.
|
|
* \param L The Lua state.
|
|
* \param ud The index of the object in the stack.
|
|
* \param tname The type name.
|
|
* \return A pointer to the object.
|
|
*/
|
|
static inline void *
|
|
luaA_checkudata(lua_State *L, int ud, const char *tname)
|
|
{
|
|
void **p = luaL_checkudata(L, ud, tname);
|
|
if(*p)
|
|
return p;
|
|
luaL_error(L, "invalid object");
|
|
return NULL;
|
|
}
|
|
|
|
static inline bool
|
|
luaA_checkboolean(lua_State *L, int n)
|
|
{
|
|
if(!lua_isboolean(L, n))
|
|
luaL_typerror(L, n, "boolean");
|
|
return lua_toboolean(L, n);
|
|
}
|
|
|
|
static inline bool
|
|
luaA_optboolean(lua_State *L, int idx, bool def)
|
|
{
|
|
return luaL_opt(L, luaA_checkboolean, idx, def);
|
|
}
|
|
|
|
static inline lua_Number
|
|
luaA_getopt_number(lua_State *L, int idx, const char *name, lua_Number def)
|
|
{
|
|
lua_getfield(L, idx, name);
|
|
return luaL_optnumber(L, -1, def);
|
|
}
|
|
|
|
static inline const char *
|
|
luaA_getopt_lstring(lua_State *L, int idx, const char *name, const char *def, size_t *len)
|
|
{
|
|
lua_getfield(L, idx, name);
|
|
return luaL_optlstring(L, -1, def, len);
|
|
}
|
|
|
|
static inline const char *
|
|
luaA_getopt_string(lua_State *L, int idx, const char *name, const char *def)
|
|
{
|
|
return luaA_getopt_lstring(L, idx, name, def, NULL);
|
|
}
|
|
|
|
static inline bool
|
|
luaA_getopt_boolean(lua_State *L, int idx, const char *name, bool def)
|
|
{
|
|
lua_getfield(L, idx, name);
|
|
return luaA_optboolean(L, -1, def);
|
|
}
|
|
|
|
static inline int
|
|
luaA_settype(lua_State *L, const char *type)
|
|
{
|
|
luaL_getmetatable(L, type);
|
|
lua_setmetatable(L, -2);
|
|
return 1;
|
|
}
|
|
|
|
static inline int
|
|
luaA_usemetatable(lua_State *L, int idxobj, int idxfield)
|
|
{
|
|
lua_getmetatable(L, idxobj);
|
|
lua_pushvalue(L, idxfield);
|
|
lua_rawget(L, -2);
|
|
if (!lua_isnil(L, -1))
|
|
{
|
|
lua_remove(L, -2);
|
|
return 1;
|
|
}
|
|
lua_pop(L, 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/** Register a function.
|
|
* \param L The Lua stack.
|
|
* \param fct A luaA_function address: it will be filled with the luaA_function
|
|
* registered. If the adresse point to an already registered function, it will
|
|
* be unregistered.
|
|
* \return Always 0.
|
|
*/
|
|
static inline int
|
|
luaA_registerfct(lua_State *L, luaA_function *fct)
|
|
{
|
|
luaA_checkfunction(L, -1);
|
|
if(*fct != LUA_REFNIL)
|
|
luaL_unref(L, LUA_REGISTRYINDEX, *fct);
|
|
*fct = luaL_ref(L, LUA_REGISTRYINDEX);
|
|
return 0;
|
|
}
|
|
|
|
/** Execute an Lua function.
|
|
* \param L The Lua stack.
|
|
* \param f The Lua function to execute.
|
|
* \param nargs The number of arguments for the Lua function.
|
|
* \param nret The number of returned value from the Lua function.
|
|
* \return True on no error, false otherwise.
|
|
*/
|
|
static inline bool
|
|
luaA_dofunction(lua_State *L, luaA_function f, int nargs, int nret)
|
|
{
|
|
if(f != LUA_REFNIL)
|
|
{
|
|
lua_rawgeti(L, LUA_REGISTRYINDEX, f);
|
|
if(nargs)
|
|
lua_insert(L, - (nargs + 1));
|
|
if(lua_pcall(L, nargs, nret, 0))
|
|
{
|
|
warn("error running function: %s",
|
|
lua_tostring(L, -1));
|
|
lua_pop(L, 1);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
int luaA_otable_index(lua_State *);
|
|
|
|
/** Create a new object table with a metatable.
|
|
* This is useful to compare table with objects (udata) as keys.
|
|
* \param L The Lua stack.
|
|
* \return The number of elements pushed on stack.
|
|
*/
|
|
static inline int
|
|
luaA_otable_new(lua_State *L)
|
|
{
|
|
/* Our object */
|
|
lua_newtable(L);
|
|
/* The meta table */
|
|
lua_newtable(L);
|
|
lua_pushcfunction(L, luaA_otable_index);
|
|
/* Register index into the metatable */
|
|
lua_setfield(L, -2, "__index");
|
|
/* Set the meta table */
|
|
lua_setmetatable(L, -2);
|
|
return 1;
|
|
}
|
|
|
|
void luaA_init(void);
|
|
void luaA_parserc(const char *);
|
|
void luaA_pushpointer(lua_State *, void *, awesome_type_t);
|
|
void luaA_cs_init(void);
|
|
void luaA_cs_cleanup(void);
|
|
void luaA_on_timer(EV_P_ ev_timer *w, int revents);
|
|
void luaA_pushcolor(lua_State *, const xcolor_t *);
|
|
|
|
static inline int
|
|
luaA_generic_pairs(lua_State *L)
|
|
{
|
|
lua_pushvalue(L, lua_upvalueindex(1)); /* return generator, */
|
|
lua_pushvalue(L, 1); /* state, */
|
|
lua_pushnil(L); /* and initial value */
|
|
return 3;
|
|
}
|
|
|
|
#define DO_LUA_EXPORT_ARRAY(pfx, typename, type, atype, ctor) \
|
|
static inline int \
|
|
luaA_##pfx##_array_index(lua_State *L) \
|
|
{ \
|
|
atype *value = lua_touserdata(L, 1); \
|
|
type **obj; \
|
|
int idx; \
|
|
\
|
|
if ((obj = lua_touserdata(L, 2))) \
|
|
{ \
|
|
for (idx = 0; idx < value->len; idx++) \
|
|
if (value->tab[idx] == *obj) \
|
|
return ctor(L, value->tab[idx]); \
|
|
return 0; \
|
|
} \
|
|
\
|
|
idx = luaL_checknumber(L, 2) - 1; \
|
|
if (idx < 0 || idx >= value->len) \
|
|
return 0; \
|
|
\
|
|
return ctor(L, value->tab[idx]); \
|
|
} \
|
|
static inline int \
|
|
luaA_##pfx##_array_newindex(lua_State *L) \
|
|
{ \
|
|
atype *value = lua_touserdata(L, 1); \
|
|
int idx = luaL_checknumber(L, 2); \
|
|
type **elem = luaL_checkudata(L, 3, #pfx); \
|
|
pfx##_array_splice(value, idx - 1, 1, elem, 1); \
|
|
return 0; \
|
|
} \
|
|
static inline int \
|
|
luaA_##pfx##_array_len(lua_State *L) \
|
|
{ \
|
|
atype *value = lua_touserdata(L, 1); \
|
|
lua_pushnumber(L, value->len); \
|
|
return 1; \
|
|
} \
|
|
static inline int \
|
|
luaA_##pfx##_array_tostring(lua_State *L) \
|
|
{ \
|
|
atype *value = lua_touserdata(L, 1); \
|
|
lua_pushfstring(L, "["typename" udata(%p)]", value); \
|
|
return 1; \
|
|
} \
|
|
static inline void \
|
|
luaA_##pfx##_array_export(lua_State *L, atype *arr) \
|
|
{ \
|
|
lua_pushlightuserdata(L, arr); \
|
|
lua_newtable(L); \
|
|
lua_pushcfunction(L, luaA_##pfx##_array_index); \
|
|
lua_setfield(L, -2, "__index"); \
|
|
lua_pushcfunction(L, luaA_##pfx##_array_tostring); \
|
|
lua_setfield(L, -2, "__tostring"); \
|
|
lua_pushcfunction(L, luaA_##pfx##_array_newindex); \
|
|
lua_setfield(L, -2, "__newindex"); \
|
|
lua_pushcfunction(L, luaA_##pfx##_array_len); \
|
|
lua_setfield(L, -2, "__len"); \
|
|
lua_setmetatable(L, -2); \
|
|
}
|
|
|
|
#endif
|
|
// vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
|